Midnight Climax by Peter Kageyama

Kats Takemoto, private detective, investigates the 1959 murder of a young Chinese girl, killed in a covert CIA brothel in the heart of San Francisco. Her family, members of the powerful Tong gang, demand vengeance that threatens to start an all-out war in Chinatown unless Kats can discover the truth behind the slaying. Along the way he will discover a personal connection to the suspected killer, a fellow veteran who was tortured and experimented on, turning him into a lethal weapon, and a ticking bomb. Kats and his friends race to find this soldier before the government and rival Tong gangs spiral into more bloodshed.
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